Roller-bearing.



m2 a z iji'flw $423M M OfLi/i/QQ F. A. WASSON.

ROLLER BEARING. APPLICATION FILED OCT-7,1916- Patented June 11, 1918.

T To ell whom it may. concern: i

l i nrrn s rains FRANK A. wAssoN, or MILWAUKEE, WISCONSIN, ASSIGNOR TOWASSON ENGINEERING ElWl rric.

AND SUPPLY OMPANY, or sAN'rA ROSA, CALIFORNIA, A CORPORATION or GALI-FORNIL Be it known that I, FRANK A. Vl Assoiv, a

citizen of the United States, and resident of Milwaukee, in the countyofMilwaukee and State of Wisconsin, haveinvented new and 1 usefulImprovements in Roller-Bearings, of which the followin is a description,reference being had to t e accompanyin drawings, which are a part ofthis speci cation.

This'invention hasfor its object to provide a rollerbearingadapted' totake side thrustjas well as endthrust by means of cylindrical rollerswith their axes at. right angles to each other and arrangedin the i samerace-way. a

Another object of theinvention iis to pro videa bearing intended forslight oscillating movement of the part supported thereby andjsodesigned that radially disposed I'Ollers will have a tendency :to shifttheir posi- "tionsand avoid the wearing of pits or pockets by reason oftheir returning to the. same position after each oscillatory move- '1ment of the supported structure.

Another object of the invention is to prol trio railway cars where thebearing may carry, current, the linecontact of the numer 1ous rollersaffording ample contact surface for this purpose. 7

as herein claimed and all equivalents.

Referring to the accompanying drawing, in which like characters of:reference indiroller 1" bearing. constructed !;in accordance Fig. 2 is avertical sectional view thereof; .Fig. is a sectional detailed view of afragment thereof; and, w l glFigi lis a view partlyin section of aportionj of "anrajilway truck equipped with the roller bearing of thisinvention: i

i In these drawings 10 indicates'abase plate whavingan upstandingannular flange 11 forming the outer wall of a race-way. An

upper'or. companion plate 112 has a depending annular flange-l3 ofsmaller diameter ROLLER-BEARING.

Specification of Letters Patent. Patented June 11, 1918,, Applicationfiled October 7, 1916. Serial No. 124,253.

alternate with the former in cases where the 'side thrust is great.Although the bearing is not confined in its use to any particularapplication, it is especially adapted for use as the center-bearing ofthe trucks of elec tric railway cars and is so shown in. Fig. 4: Wherethe truck bolster 18 has the base plate 10 secured thereto and the carbeam 19 is provided with the upper plate 12.

In operation the weight of the car body or other structure supported bythe bearing, is taken by the horizontal rollers 16 and the lining rings14 and 15, while the side thrust, as when the car is rounding a curve,is taken by the vertical rollers 17 and the flanges 11 and, 13.

It is a well-known fact that, from one cause or another, there is aslight oscillation of a railway truck on its kingpin even.

. i whenthe car is traveling on a straight track. Withthe above andother objects in view 5 wthe-vinvention consists ofthe roller bearingWith center-bearings in which balls or conical rollers are used asanti-friction members such members by rocking back and forth oversubstantially the same points in the race-way wear pits or depressionsforming grooves or pockets in the bearing surface of the race-way whichas they increase in depth tend to trap the balls or rollers and preventtheir freely traveling when occasion re quires, on turning around acurve. Thus the short oscillating movements of the truck in the travelon a straight track tend to me ate acondition in the bearing whichprevents a free operation of the bearing to accommodate the greatermovements of the truck on a curved track. With the roller bearing of thepresent invention, however,

truly radial position and consequently distribute the normalbearing dutyover a greater area of surface of the bearing \valls of the race-Way andreduce their tendency to Wear pits or cavities. This efl'ect is ofgreater importance Whenuthe bearing-is relied upon to carry an electriccurrent as in the case of center-bearings for electric rail- Way trucks,and bearings for trolley bases and the like, for then thear'cing 'atthepoints of eontactiserves to increase? the pit forming tendency of therollers orballsand such tendencyis retardedbyspreading the normalcontact surface 'of the race-Way over a greater area. It will be noted'that the presence of the vertical rollers allows greater opportunityfor the horizontal rollers to shift their positions so as "tobe other"than radial, butof course the primary function of these verticalrollers is to prevent the horizontal rollers being crowded betweentheflangesll and 'l3'forming the side Walls ofthe race-Way or, inotherwords; to'taike the Side thrust of the bearing. These,vertical'rollers are slightly shorter than the distance between thelining rings '14 a t-15 and slide'ofltheir lower ends thus furthertending to avoid "the formation of hollows by scouring the surface ofthelower'lining ring let. Thelining rings 14 and15being removable arecapable of being renewed when the bearing is Worn, thus restoring thebearing to its original condition Without involving considerableexpense.

It is obvious that this invention is ca'p'able of general application,though it is particu larly eflicient Where it has to serve'the threefoldduty of sustaining'end thrust and side thrust and of carrying aheavy electric =cur- 2 rent.

" It will be noted that the object'of'the'invention' is'not' so much toreduce friction as t 1's toreduce Wear and'to Increase current carryingcapacity. The slightresistance 'of fered to the turningmoveinent due tothe non-radial positionsoit' the rollers is, therefore, unobjectionable.on the other "hand,

it mayserve to holdthe' truck'steady' against the usual tendency to nosefirst tot'he right andthen to the left. What I claim as'neW'"ai1d"desire'to-secure 1. A rollerthrust bearing forcon'ductingelectrical current having an annular race- Way'b'etWeen relativelyfirledand oscillatory parts and cylindrical rollers arranged irrthe race-Way"in approximately radial positions,

and means forconfining the rollers within the race-Way and permittinga"'slighttangential'travel thereof to shift'their'axes out of'the radialpositions, so thatthey advance and return in different paths and Weartheir contacting surfaces clean.

2.. .A rollerbearing:dorrconducting electrical current comprising a basehaving an annular flange, a companion plate also having an annularflange or different i diameter from the annular flange "of thfbase'plate and forming the side Walls of arace-Way therebetween, cylindricalrollers in the racewayin approximately radial positions and havingsuflicient play between thdflanges *-to"-per1ni-t-oislight straight linemovements thereof tangent to the inner flange to slightly shift themfrom '=theirradialpositions, "and wear their eenta'cting surfaces-" tomaintain their conductivity.

' 3!- A' Tonerbearing*foreonduetinganelectrical current comprising ahasehavingfan "anriular-j'fia'nge, acompanion plate having an annular flangeoi difl'erenti diameterg hard metal lining! rings-removably secured'insi'de the'la-rger flangeai1d-:outside the* smaller flange,"cylindrical rollers i11 approximately radial positions Within "therace-wayrrand f "having sufiic-i'ent play between the flanges to permitor slight straight" line movements thereof to depart front trulyradial'-rposi tions and polish their contactingsurfacesto with theaxis'ott the bearing and takingzthe -53 A' reller bearia to "constitutea can rent carrying *center earing for" electrical railway truckscomprising abase adapted to i i be attached to r the bolster 0f"=the'truck and provided with '-an upstanding annular'flange, a companionp'l-ate *adaptedto b'e scouted to the *b'eam of a ear-bodyand providedwith a downward1 -extendin annular flangepm sitioned Within the flange'of the baseand 1 forming' am annular race-Way therebetween,

hardmetai lining rings removablye secured to the base andtheco'mpanion"platmrespecthe"truedadialpositions; so a's*'to Wear their"contacting surfaces clean 'aild maintain con- 120 ductivity, othercylindrical rollers posi- In testimony whereof I aflix my signaturetioned between the radial rollers and bearin presence of two witnesses.ing against the flanges to take the side FRANK A. WASSON. thrust of thebearing and having their axes Witnesses:

5 approximately parallel With the axis of the R. S. C. CALDWELL,

bearing. H. D. CHASE.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Iatentm Washington, D. G.

